/Engine/Source/Runtime/GeometryCore/Public/Util/ProgressCancel.h
Advance current progress a fraction of the way toward a target value For example: if progress is .5, AdvanceProgressToward(1, .5) will take a half step to 1 and set progress to .75 As with all public progress function, progress is expressed relative to the current active progress range and cannot go backward.
void AdvanceCurrentScopeProgressToward ( float TargetProgressFrac, float FractionToward )